Taylor Swift’s “Shake It Off”video is good, but it’s not late-’80s aerobics good. So it’s definitely for the best that YouTube user Thomas Jung combined Swift’s hit single with the video of the National Aerobic Championship from, of course, 1989. (Note: It may actually be from 1988.) It’s astonishing how well the song fits over the dance routine and surprisingly poignant just how well the “dance to your own drum” anthem is expressed through jubilant exercise routines a quarter-century old.